<template>
	<view>
		<view class="search-box">
			<uni-search-bar @confirm="search" @input="input" :radius="100" cancelButton="none"
			placeholder="请输入搜索内容"
			></uni-search-bar>				
		</view>
		
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
		  <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
		    <view class="goods-name">{{item.goods_name}}</view>
		    <uni-icons type="arrowright" size="16"></uni-icons>
		  </view>
		</view>
		
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
		  <!-- 标题区域 -->
		  <view class="history-title">
		    <text>搜索历史</text>
		    <uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
		  </view>
		  <!-- 列表区域 -->
		  <view class="history-list">
		    <uni-tag :text="item" v-for="(item, i) in history" :key="i" @click="gotoGoodsList(item)"></uni-tag>
		  </view>
		</view>
	</view>
</template>

<script>
	var time = null
	export default {
		onLoad() {
		  this.historyList = JSON.parse(uni.getStorageSync('historyList') || '[]')
		},
		data() {
			return {
				inputVal:'',
				// 搜索结果列表
				searchResults: [],
				// 搜索关键词的历史记录
				historyList: ['a', 'app', 'apple']
			};
		},
		methods: {
		  input(e) {
			//防抖
			clearTimeout(time)
			time = setTimeout(()=>{
				this.inputVal = e
				this.getSearchList()
			},500)
		  },
		  getSearchList() {
			  console.log(this.inputVal)
			if(this.inputVal.length==0){
				this.searchResults = []
				// this.saveSearchHistory()
			}else{
				uni.$http.get('/api/public/v1/goods/qsearch',{ query: this.inputVal }).then(res=>{
					this.searchResults = res.data.message
					this.saveSearchHistory()
				})
			}
		  },
		  gotoDetail(goods_id) {
		    uni.navigateTo({
		      // 指定详情页面的 URL 地址，并传递 goods_id 参数
		      url: '/subpkg/goodsDetail/goodsDetail?goods_id=' + goods_id
		    })
		  },
		  saveSearchHistory() {
		    // this.historyList.push(this.inputVal)
			
			 // 1. 将 Array 数组转化为 Set 对象
			  const set = new Set(this.historyList)
			  // 2. 调用 Set 对象的 delete 方法，移除对应的元素
			  set.delete(this.inputVal)
			  // 3. 调用 Set 对象的 add 方法，向 Set 中添加元素
			  set.add(this.inputVal)
			  // 4. 将 Set 对象转化为 Array 数组
			  this.historyList = Array.from(set)
			  
			  // 调用 uni.setStorageSync(key, value) 将搜索历史记录持久化存储到本地
			  uni.setStorageSync('historyList', JSON.stringify(this.historyList))
		  },
		  cleanHistory(){
			  // 清空 data 中保存的搜索历史
			    this.historyList = []
			    // 清空本地存储中记录的搜索历史
			    uni.setStorageSync('historyList', '[]')
		  },
		  gotoGoodsList(item){
			  uni.navigateTo({
			      url: `/subpkg/goodsList/goodsList?query=${item}`
			})
		  }
		},
		computed:{
			history(){
				return [...this.historyList].reverse()
			}
		}
	}
</script>

<style lang="scss">
	.uni-searchbar{
		background-color: #c00000;
	}
	.search-box {
	  position: sticky;
	  top: 0;
	  z-index: 999;
	}
	.sugg-list {
	  padding: 0 5px;
	
	  .sugg-item {
	    font-size: 14px;
	    padding: 13px 0;
	    border-bottom: 1px solid #efefef;
	    display: flex;
	    align-items: center;
	    justify-content: space-between;
	  	&:last-child{
			border: none;
		}
	   .goods-name {
	     // 文字不允许换行（单行文本）
	     white-space: nowrap;
	     // 溢出部分隐藏
	     overflow: hidden;
	     // 文本溢出后，使用 ... 代替
	     text-overflow: ellipsis;
	     margin-right: 3px;
	   }
	  }
	}
	.history-box {
	  padding: 0 5px;
	
	  .history-title {
	    display: flex;
	    justify-content: space-between;
	    align-items: center;
	    height: 40px;
	    font-size: 13px;
	    border-bottom: 1px solid #efefef;
	  }
	
	  .history-list {
	    display: flex;
	    flex-wrap: wrap;
	
	    .uni-tag {
	      margin-top: 5px;
	      margin-right: 5px;
	    }
	  }
	}
</style>
